6699999751 has 4 divisors (see below), whose sum is σ = 6991304112. Its totient is φ = 6408695392.

The previous prime is 6699999749. The next prime is 6699999769. The reversal of 6699999751 is 1579999966.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1579999966 = 2 ⋅789999983.

It is a cyclic number.

It is not a de Polignac number, because 6699999751 - 2¹ = 6699999749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6699999781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145652146 + ... + 145652191.

It is an arithmetic number, because the mean of its divisors is an integer number (1747826028).

Almost surely, 2^6699999751 is an apocalyptic number.

6699999751 is a deficient number, since it is larger than the sum of its proper divisors (291304361).

6699999751 is a wasteful number, since it uses less digits than its factorization.

6699999751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291304360.

The product of its digits is 74401740, while the sum is 70.

The square root of 6699999751 is about 81853.5261977149. The cubic root of 6699999751 is about 1885.2036076670.

The spelling of 6699999751 in words is "six billion, six hundred ninety-nine million, nine hundred ninety-nine thousand, seven hundred fifty-one".